Here is a list of 5 free Cloud Storage services you might want to try:
1. Dropbox. This is my all-time favourite. With Dropbox I can store, sync, and, share files online for free. Not all cloud services will sync. If that's not important to you, don't worry about it. But I like to have at least one service that will automatically sync my uploaded files to all my devices. You get 2 GB of free space but you can get more with referrals. If you still need more you can always subscribe to Dropbox Pro, available in 100 GB, 200 GB, and 500 GB plans. You can even get more than 500GB with their Business Plan.
2. Google Drive. 15 GB of free space plus the use of Google spreadsheets and docs makes this a great choice. I use Google Drive quite a bit and it's easy to share editing of files with others.
3. Bitcasa: 10 GB of free storage and surprisingly, for $99.00 a year you can have unlimited storage with their Infinite Plan. I like this option very much and am probably going to sign up for Infinite.
4. Amazon Cloud Drive: 5GB of free storage. I use this for genealogy certificates.
5. SugarSync: 5GB of free storage makes this another option. You can pay for 60GB, 100GB or 250GB plans if 5GB isn't enough for you
I haven't included SkyDrive as I don't care for it. But lots of people do use it and you can get 7 GB of storage so you might want to check it out too.
Let's talk about having your own personal cloud storage and external hard drive systems. I use Western Digital MyBookLive which hooks up to your home network and gives you your own private cloud storage. It's easy to drop files into it and it also creates a backup of your computer hard drive. I bought the 2TB version at Amazon and there is a 3TB version available too. The WD My Book Live 2TB
It's a bit of work setting it up but once you do, it's easy to use. You can even set up different folders for different family members and can password protect the folders if you wish.
I also use the WD My Passport 1TB Portable External Hard Drive Storage
Hopefully these ideas will help you if you're struggling with what cloud service or what type of external back up system to use.
Credits: "Computer Computing Global Social Networks" by KROMKRATHOG on FreeDigitalPhotos.net

